Lindsay won't be the first celebrity to serve as a judge. Both Josh Groban and Olivia Newton-John played themselves, serving as Regionals judges.

The "Glee" appearance is the latest move in Lindsay's comeback. She recently served as the host of "Saturday Night Live," and, in news first reported by Access Hollywood's Billy Bush, Lindsay has been cast as Elizabeth Taylor in Lifetime's "Liz and Dick."

The actress is due in a Los Angeles courtroom on Thursday for a progress report hearing.